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Yeast Balloon Experiment Worksheet

Science experiments lesson 16: Yeast balloon · Set 752 · 40 questions
TalentJR

What you do (Yeast is alive): 1. Pour warm (not hot) water into the bottle — an adult checks it. 2. Add the yeast and the sugar and swirl gently. 3. Stretch the balloon over the bottle’s mouth. 4. Wait 30 minutes, measure the balloon, then pour the mixture away and wash up.

NameDateTime takenScore ___ / 40
  1. 1.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we measure it (b) we keep it the same (c) we change it
  2. 2.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
  3. 3.🛟 After the yeast experiment, what should you do with the mixture? (a) pour it down the sink (b) put it in your mouth (c) keep it for a month (d) throw it at a wall
  4. 4.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) True (b) False
  5. 5.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is bigger (b) it turns to bread (c) it shrinks to nothing (d) the balloon is smaller
  6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a battery cell (c) a balloon (d) dry yeast
  7. 7.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) carbon dioxide gas (c) air from outside (d) steam
  8. 8.🛟 The water for the yeast should be ___. (a) boiling hot (b) ice cold (c) warm, not hot (d) very salty
  9. 9.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a paper clip (c) dry yeast (d) sugar
  10. 10.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it turns to sugar (b) it grows faster (c) it glows (d) the yeast is killed
  11. 11.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) a small bottle (c) a mirror (d) dry yeast
  12. 12.True or false: sugar is needed for the yeast balloon. (a) True (b) False
  13. 13.True or false: vinegar is something yeast needs. (a) False (b) True
  14. 14.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows very little (d) it grows much faster
  15. 15.🧺 Which of these is not needed for the yeast balloon? (a) a magnet (b) dry yeast (c) sugar (d) a balloon
  16. 16.🍞 Which of these is something yeast needs? (a) time (b) vinegar (c) salt (d) a magnet
  17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) True (b) False
  18. 18.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
  19. 19.🧺 Do we need a magnet for the yeast balloon? (a) not needed (b) needed
  20. 20.True or false: a comb is needed for the yeast balloon. (a) True (b) False
  21. 21.🧺 Do we need a mirror for the yeast balloon? (a) needed (b) not needed
  22. 22.True or false: warm water is something yeast needs. (a) True (b) False
  23. 23.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
  24. 24.🍞 Does yeast need sugar to make gas? (a) yeast needs it (b) yeast does not need it
  25. 25.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) warm water (c) a battery cell (d) a comb
  26. 26.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) turmeric powder (c) sugar (d) warm water
  27. 27.🔍 Which is the odd one out? (a) sugar (b) warm water (c) time (d) sunlight
  28. 28.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) turmeric powder (c) a comb (d) a balloon
  29. 29.🔍 Which is the odd one out? (a) time (b) a magnet (c) vinegar (d) salt
  30. 30.🧺 Which of these is needed for the yeast balloon? (a) a paper clip (b) dry yeast (c) turmeric powder (d) a mirror
  31. 31.🧺 Do we need a balloon for the yeast balloon? (a) needed (b) not needed
  32. 32.🍞 Why do we add sugar to the yeast? (a) to make it sweet (b) to colour it (c) it is food for yeast (d) to make it heavy
  33. 33.🍞 Which of these is something yeast does not need? (a) sugar (b) time (c) a magnet (d) warm water
  34. 34.🧺 Do we need a comb for the yeast balloon? (a) needed (b) not needed
  35. 35.🍞 Which of these is something yeast needs? (a) warm water (b) sunlight (c) a magnet (d) vinegar
  36. 36.🧺 Which of these is not needed for the yeast balloon? (a) sugar (b) dry yeast (c) warm water (d) a battery cell
  37. 37.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we measure it (b) we keep it the same (c) we change it
  38. 38.True or false: sugar is something yeast needs. (a) True (b) False
  39. 39.🍞 Where is yeast used in the kitchen? (a) to wash dishes (b) to clean floors (c) to make bread rise (d) to colour rice
  40. 40.🍞 Which of these is something yeast needs? (a) vinegar (b) sugar (c) a magnet (d) salt

Answer key

  1. we keep it the same
  2. needed
  3. pour it down the sink
  4. True
  5. the balloon is bigger
  6. a battery cell
  7. carbon dioxide gas
  8. warm, not hot
  9. a paper clip
  10. the yeast is killed
  11. a mirror
  12. True
  13. False
  14. it grows very little
  15. a magnet
  16. time
  17. False
  18. needed
  19. not needed
  20. False
  21. not needed
  22. True
  23. yeast needs it
  24. yeast needs it
  25. warm water
  26. turmeric powder
  27. sunlight
  28. a balloon
  29. time
  30. dry yeast
  31. needed
  32. it is food for yeast
  33. a magnet
  34. not needed
  35. warm water
  36. a battery cell
  37. we change it
  38. True
  39. to make bread rise
  40. sugar

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